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| author | Michael J. Ruhl | 2019-06-28 20:22:04 +0200 |
|---|---|---|
| committer | Jason Gunthorpe | 2019-06-29 03:34:26 +0200 |
| commit | d310c4bf8aeacc0256091feb6a0337b8fef763ac (patch) | |
| tree | a9dd155f469d37fc696e2ebf8a1570a2dc30f582 /include/rdma/rdma_vt.h | |
| parent | IB/rdmavt: Set QP allowed opcodes after QP allocation (diff) | |
| download | kernel-qcow2-linux-d310c4bf8aeacc0256091feb6a0337b8fef763ac.tar.gz kernel-qcow2-linux-d310c4bf8aeacc0256091feb6a0337b8fef763ac.tar.xz kernel-qcow2-linux-d310c4bf8aeacc0256091feb6a0337b8fef763ac.zip | |
IB/{rdmavt, hfi1, qib}: Remove AH refcount for UD QPs
Historically rdmavt destroy_ah() has returned an -EBUSY when the AH has a
non-zero reference count. IBTA 11.2.2 notes no such return value or error
case:
Output Modifiers:
- Verb results:
- Operation completed successfully.
- Invalid HCA handle.
- Invalid address handle.
ULPs never test for this error and this will leak memory.
The reference count exists to allow for driver independent progress
mechanisms to process UD SWQEs in parallel with post sends. The SWQE will
hold a reference count until the UD SWQE completes and then drops the
reference.
Fix by removing need to reference count the AH. Add a UD specific
allocation to each SWQE entry to cache the necessary information for
independent progress. Copy the information during the post send
processing.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/rdma/rdma_vt.h')
| -rw-r--r-- | include/rdma/rdma_vt.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h index 997f42678806..525848e227dc 100644 --- a/include/rdma/rdma_vt.h +++ b/include/rdma/rdma_vt.h @@ -2,7 +2,7 @@ #define DEF_RDMA_VT_H /* - * Copyright(c) 2016 - 2018 Intel Corporation. + * Copyright(c) 2016 - 2019 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. @@ -202,7 +202,6 @@ struct rvt_pd { struct rvt_ah { struct ib_ah ibah; struct rdma_ah_attr attr; - atomic_t refcount; u8 vl; u8 log_pmtu; }; |